Gearing.



` W. 0. HANCOCK.

GEARING.

APPLICATION FILED NOV. 30, 1909. 970,328, Patented Sept. 13,1910.

1 l l J vf/ 2 1 @7 ,1.6- f n A g ,-15 u 001 10, 2 l L f 14' 5121 5 5 -*mn 7? fla JQV LA 2? )A I`V"`"""" f f Y V f f' -17 7 2 2 i L f1/l 18 f6 i `1 v me/Mofa WILLIAM OHANGOK.

Witwen/co and the like.

UNITED sfrarns PATENT OFFICE.

WILLIAM 0. HANCOCK, OF ORLEANS, INDIANA.

GEARING.

To all whom tt may concern:

Be it known that l,'Wn.r/i.\.u O. ll'axeoon, a citizen of the United States, residing al Orleans, in the county ot' Orange, State it lndianal,`l1ave invented certain new and use ful Improvements in Gearing; and l do herebydeclare 'the iiollowing to be a lull, clear, and exact description o't' the invention, such as Willenable othel's skilled in the art to-which it appertains to make'and use the same.

This invention relates to transmission gearing and has special reference to that form. of traiismission gearing which is commonly used on automobiles, traction engines One object' of the inventionis to provide an improved means whereby one of the driving wheels of a motor ear ma v be permitted to rotate in "one direction While the other -wheel is rotated in the opposite direction.

Another object of the invention 1s to provide an improved means whereby both Wheels ymayV be rotated in unison in the same direction.

It is well understood that in this class ot' devices it is usual to employ what is commonlyl termed a differential train. It is also understood that almost all motor vehicles have their 'driving wheels on .separate seetions of the axle so that the wheels may he rotated independently of each other. l"urtherniore, these sections are usually actuated by a dii'erential train so that where the load or resistance to movement of both wheels is equal the differential train will operate to rotate bothat the same speed, while Where the resistance is greater on one than on the other, as in going around corners, one of thewheelswill be allowed to rota te at a different rate of speed from the other. lt is practically essential that the wheels should be mounted in this manner but dillicult y is experienced when one ot the wheels strikes a slippery'spot while the other wheel is on solid ground as the tendency is tor the machine to standstill since the wheel on the slippery ground simply rotates without driving the machine forward while the other wheel docs not move. l'y means ot the provision set vforth in the second object ofthe invention this ditlieulty is elimiimttal as both wheels can be locked together to positively move in unison.

With the above and other objects 1n vlew,

Speeiflcation of Letters Patent. ];1 limited Application filed November 30, 1909; Serial No. 530,699.

sept. 13, 191e.

as will he hereinafter a iparent, the invention consists in general of a dill'erential train including a driving gear and a driven gear and means lo drive either or both of' said gears. l

lhe invention further consists in certain novel details ot construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings, and speeilically set, forth .in t-he claims.

ln the accompanying drawings, like characters ot' reference indicate like parts in t-he several views, and :-1 `igure 1 isa view of the rear portion of au automobile chassis with this invention applied thereto, all gear easings being left. otl' the better to show the working parts, and the band brake used with this invention being in section t'or the same reason. Fig. 2 is a section on the line 2-2 of Fig. 1. y The numeral 1() indicates the chassis of an automobile and-on this chassis are earried in suitable bearings rear axle sections 11 and 12. ',l'hese'sections have their inner ends in juxtaposition and on these inner ends is mounted a freely rotatable gear 13. `On the outer ends of thesey sections ale mounted the usual driving wheels 14.

rIhe gear 13 is provided with one or more. openings therethrough us indicated at 15 and 'shal'ls lt are held in these openings. ()n these shal'ts lt' are lnounted idler. piliious I7. llpon the enrl oi the axle ll in such position as to mesh with the pinionsI IT is a driven gear '1S while in similar position on the axle section 1Q is a similar bevel gear .ttl likewise meshing with the pinions `1 'l'. Secured lo the bevel gear 19 is a gear 2() preferably termed the mate for the driving gear and otl the same diameter and pitch as the driving gear 13. l.

Mounted in suitable bearings on the chassis is a sha tt 2l `whereon is splined a gear 22 provided with a collar 23 having a groove 24 therearoulul. Secured to the chassis is a `bracket 25 which has pivoted Athereto a bell crank shipper lever iti 'one arm of which is` forked to engage 1u the groove 24: while the. other arm 1s connected to a rod 27 running `to the operating lever at.` 'the' front ofthe the gear 20 at the same time whenproperly positioned and the shipper lever 26 1s so proportioned that the gear 22 may be moved to engage either the gear 13 or the gear 2O individually or to engage the two gears 13 and 2O collectively. t

In order to operate the' shaft 21 sultable means is provided such as a sprocket 28 which is vsecured to the shaft and which 1s connected by means of the ordinary sprocket chain to the engine or motor. This driving means is merely typical of any suitable means to rotate the shaft 21 and it will be understood that any other mechanism can be used in place thereof.

Secured to the gear 13 is an annular hub 29 surrounding which is a band brake 30 of the usual construction and this band b rake is actuated by a lever 31 having a rod 32 extending therefrom to the forward portion of the car, this rod being provided with the f usual latch lever or other suitable means for i and l?, will be caused to rotate at an equal' actuating the same not deemed necessary here to be shown.

In the operation of this device when the car is traveling over the ordinar road and in a straight line or substantia ly so, the gear 22 is positioned so as to engage with the gear 13 and to be out of engagement with the gear 20. lVhen in this position the differential acts in the usual manner common to these devices. -If it is desired to turn a very sharp corner the gear 22 is shifted so as to engage the gear 20 and be out of engagement with the gear 13. `At the same time the band brake is applied andthe gear 13 prevented from rotatin Now,`if itbe desired to turn to the left the gear 22 is rotated in such direction as would cause the car to move forward. This will "rotate the gear 20 in a forward direction while the gear 18, through the actioniof the gears 19 speed in a backward direction. In this manner if the steering wheels are properly po-y sitioned the car may be turned in its .own length. If it be desired to turn to the right the motion of the gear 22 is reversed so that th'e gear 20 will be run backward and the gear 18 forward.

If a slippery place is struck while passing over the road and the machine' becomes stalled by reason of one of the shafts rotatvthe manner' common with differential gearing, or to positively lock both sections of the positively rotate in unison.

There has thus been provided a simple and the purpose specified. Having thus descri is claimed as new, is

1. In a device of the kind described, a differential train including adriving gear and a driven gear, and means to drive either or both of said gears. 2. In a device of the kind described, a differential' train' including 'a driving ear, a 1pair of driven gears, and an idler mes in with the driven gears; in combination witg means to hold the driving gear from rotating, and other means to drive the remainder of the train when the driving gear is so 3. In a device of thekind described, a diferential train including a driving gear,

bed vthe invention, what vaxle together so as to cause'both wheels to efficient device of the kind described and for-..7

a pair of driven gears, and an idler meshing with the'. driven ears;'in combination with means to hold t e driving gear from rotating, and other means to drive the remainder ofthe train when the drivin gear is so held, said other means being a apted to drive the driving gear when not so held.A 4. In a device of the kind described, a differential train includin a driving gear, a pair of driven gears, an an idler, vineshin with the driven gears; in combination witgv means to hold the driving gear from rotating, and other means to drive the remainder of the train when the driving'gear is so held, said other means being adapted to drive the driving gear when not so held and being further adapted to drive both the driving and driven gears in unison.

`5. In a device of the kind described, a two-part axle, a driving gear freely rota, table-thereon,'pinions carried by said driving gear, ear on oneipart of said axle meshing wit on the other art of the axle also meshing with the pinions, said pinions and other meshing gears being beveled, a second gear of equal dimensions to the driving gear and secured to one of Athe bevel gears, a drivin shaft, -a gear splined to said shaft` and adapted to mesh with the driving gear and its mate, and means to move the last menloi;

said pinions, a second gear tioned gear on the driving shaft to cause the other part of the axle also meshing with the inions said inions and other meshin P a p gearsbeingbeveled, a second gear of equa dimensions to the driving gear and secured. y

to one of the bevel gears, a drivinnr shaft;7`y Shaft is in mosh with the mate' of the driv- 10 geur splined to said shaft; and aiapted ing gem'.

mesh with the driving geur and its mate, In testimony whereof, I affix my signa,- neas to moll/@fthe last mntind gear ol ture, in presence of two witnesses.

te rvinrsattocausetesametomesi v- T -vwith the Liiriving gen1', with its mate, or WIILLIM O' HALCOQI" with both thedrvmg gear and its mate, :L W imcsses: brakearmnged to hold said drivin gear SHERMAN Summen; from rotation when the gear on the riving THOMAS J. Smwmmn. 

